Persistence in Entity Framework There are two scenarios when persisting an entity using EntityFramework, connected and disconnected scenarios. Connected Scenario: This is when an entity is retrieved from the database and persist is used in the same c…

Types of Entity in Entity Framework: We created EDM for existing database in the previous section. As you have learned in the previous section that EDM contains entities for each table in the database. There are two types of Entities in Entity Framew…

What is Entity Framework? Writing and managing ADO.Net code for data access is a tedious and monotonous job. Microsoft has provided an O/RM framework called "Entity Framework" to automate database related activities for your application. Microso…

Delete Entity using DBContext in Disconnected Scenario: We used the Entry() method of DbContext to mark EntityState as Modified in the previous chapter. In the same way, we can use the Entry() method to attach a disconnected entity to the context and…

Update Existing Entity using DBContext in Disconnected Scenario: In this chapter, you will learn how to update a single entity in a disconnected scenario. If you use Database-First approach, then create an Entity Data Model as shown in the previous c…

Add New Entity using DBContext in Disconnected Scenario: In this chapter you will learn how to add new entity in DbContext in the disconnected scenario, which in turn inserts a new row in a database table. If you use Database-First approach, then cre…

以下系列文章为Entity Framework Turial Basics系列 http://www.entityframeworktutorial.net/EntityFramework5/entity-framework5-introduction.aspx ----------------------------------------------------------------------------------------------------------------------…

Migration from Entity Framework 4.1/4.3 to Entity Framework 5.0/6.0 To migrate your existing Entity Framework 4.x project to Entity Framework 5.0 using VS2012, first target .NET Framework 4.5: Second, remove the existing Entity Framework 4.1/4.3 refe…

Update Entity Graph using DbContext: Updating an entity graph in disconnected scenario is a complex task. It is easy to add a new entity graph in disconnected mode, but to update an entity graph needs careful design consideration. The problem in upda…

Disconnected Entities: Before we see how to perform CRUD operation on disconnected entity graph, let's see how to associate disconnected entity graph with the new context instance. There are two things we need to do when we get a disconnected entity…